Hallo!
There are also ambisonic externals from IEM and Jasch, for better spatialization.
I would not say "better" ;) - it depends ...
Maybe a Spatialisation with Pure-Data page would be nice - is there something like that out there already? a web page, academic papers, performance documentation, patches??
Last year I did a workshop on this, you can find the files here: http://grh.mur.at/misc/PdSpatialization.tar.gz
LG Georg